Comb lock assembly



March 6, 1945. c. o. BRUESTL 2,370,774 A COMB LOCK ASSEMBLY 2 Sheets-Sheet l Filed o'ct. 25, 194sv March e, 1945. C, Q, BRUESTLE 5 2,370,774

00MB Locx ASSEMBLY l 2 Sheets-Sheet 2 Filed Oct. 25, 1943 Patented Mar. 6, 1945 PATENT oFFlcE 2,370,774 I domeinen ACarl 0. Brucstle, lt ahway, N. 1 as sgnor to Borg.-

Warner Corporation, "Chicago, Ill., a corporation of 'Illinois Application october 1.25, 19.4.3, Serial Nn! 597,581

v Claims. Thisl invention relates to weaving machines .and the likeJ :and it is ,directed .primarily to .the provision of improvements in the .Weavinghead tor such weaving machines as those usedfor weaving metallic screen cloth such as that disclosed in United States lPatent N0. 2,19%,.222, issued to Ewing.

. It `has been .found `that in weaving machines heretofore available .for .weaving metallic 'screen cloth Aand the like, suchlas machines yof the .type shown in United States VLetters 'Patent No.

2,223,317, issued to W. 13. Ewing., ,November 2 6,y

1940, the comb assembly of the weaving head vibrates upon 4its return to .a position closest to the quill assembly instead Iof `properly .seating vin the position intended. This `v bratirl is due, among other things, tothe forces deyeloped in the .comb assembly bythe movement ofthe operating cam `roller over the Asurface o f the cam, and

particularly to the fact that change -iroin the rise to thedwell ofthe cam is `rather abruptand rapid.

This vibration -of the comb assembly has a dis'- torting effect .on .the fabric being woven, which is In this connection, it is-an object to prox/,ideav locking means catching and locking thepombassembly in the position desired vthe instant ,it is returned to vthai-.position by movement pf the. cam

. roller from .the rise to the dwell of the cam,

whereby vibration sufficient todistort the screen cloth -and batter the quills, or either, is substantially damped o r entirely prevented;

It is an object of the present invention t0 provide a construction in which the movementof Vthe comb assembly vaway from the quill assembly in eachcycle ofoperation is initiated bya cam roller moving from the dwell to the risefof-a plate-cam, butin which the cam roller is held to the plate cam'by force of aspring and thereby the comb assembly is returned by spring force t0 the-desired position .with respect to the quill ,assembly .and frame of the weaving machine as r-the cam roller mores from 'the rise te the dweuof thecam 'and toproyidealockine meansinwhich thecombassembly is locked in the predetermined pgsition adjacent ,to the quill assembly as the cam roller completes the ymovement .from the rise to the dwell by a lockingmeans which automatically releases after danger of such vibration, so as not to interfere with the subsequent cycleo-f operations.

It is a further object 4to disclose a new comb assembly lock for preventing 4vibration of the comb assembly with reference to the quill assembly by means including an auxiliary roller which is adjustable, -an internal arcuate segmental cam engaging said (roller, a reciprocating plate type cam :which initiates the desiredmovements o f 'the' comb assembly, and a cam roller bearingy on said reciprocating plate cani.-

Itis a further object of the inventiQn -to provide a construction which is easilyassembled, which is readily'adjustable, and one which is comparatively inexpensive. L f I Other 0bJ' .Ct S, the @advantages and :uses Qf rthe invention will. become more apparent after lreadz ing the following specicationand claims, and after consideration of the drawings formingy a partof the specication, wherein:

Fig. 1 is a fragmentary crosssectiona1side ele,- vational View of the portion .of a Wea-ving ma.-

rchine generally referred to as the weaving head assembly; y

Fig. 2 isa fragmentary rear elevationaliview of a portion of the device yof Fig. 1, looking toward 3b-the front as indicated bythe arrow of Fig. 1,; and

Fig. 3 is a 4viewsimilar toy Fig. 2 but villustrating a cam `mechanism usedy vfor driving'the'qll-ll oper-.

ating means. i

Referring more in detail yto the construe tienV 35 shown in the drawingswthere. is. provided what. may be utermed the weaving head assembly yhav-l ing the frame 22, the base portion 24, the combl assembly 26, anda .drivingmeans .(not' shown) but represented by the drive shaft 2 8.

The frame 22 preferably carries thequill assembly 30, whichquill 3 0 isoperated by the rack a 32, .which rack in turn is driven'by the-rack varm 34. The rack arm 3 4 is journalledto the .iframe 22 (as 4indicated in Fig, 1), and has a reciprocating.v motionimparted b-y the drum cam 136 (seeFig. '3). lThe comb assembly 26 is carriedby a support. arm38 which preferably is an integral partoffthe web 40. f v

Thesupport arm 3-8 and-the integral webvd are f movable about theaxle 4 2, on which theyrare journalled, and they are fheld in placeon said axle by means ofthe member `Ml and' bolt 46, in a manner which will be apparent from Fig-:1.

The-web 40 tsee Figs. 1 and 2,-.) also has; a .6.5- brackft .pennen 48 which .preferably iis' .integralwith said web 40, and which extends upwardly and has an overhanging ledge portion, as shown.

Attached to the bracket 48 by means of bolts or the like 50 is a link 52, which is adjustable longitudinally with respect to the bracket 48. For this purpose the link 52 may be provided with the slot shaped bolt holes 54, as is clearly apparent from the drawings, through which the bolts 50 pass, and by means of which Ythe link is adjustably retained on the bracket 48. The set screw assembly 56 passes through the bracket y 48 and seats against the links 52, aiding the bolts 58 in holding said link 52 in longitudinal adjustment with respect to the bracket 48.

The bracket 48 carries the cam roller shaft 58. This roller shaft 58 is preferably in the form of a bolt having a head portion` 60, and a nut B2, which latter is threaded on to the end of the roller shaft 58.

The roller shaft S forms the axle for the lock roller 54, and is preferably offset or eccentric a small amount, vfor example, 12 of an inch, in the portion which supports said lock roller 64. This is so that the lock roller 54 may be readily adjusted to compensate for wear of the parts as will hereinafter be explained.

The roller shaft 58 also carries the cam lift roller 56, which is preferably spaced very slightly from the lock roller 84. The reason for this spacing is that the cam lift roller 86 and the lock roller 64 will normally rotate in opposite directions, and by so spacing them, friction between them will be avoided. The link 52 with its rollers 66 and B4 constitutes a follower assembly for cams 68 and 16.

The cam lift roller B8 normally engages the plate cam E8 (see Figs. 1 and 2), which has the dwell portion 'I8 and the rise portion 12.

The spring 14, carried by the frame 22 normally exerts a 4downward pressure on the web 48 and therethrough on the bracket 48 and cam lift roller 5. This ordinarily retains cam lift roller 6G in close engagement with the dwell and rise portions ofthe surface of the cam 68. It is noted however that the rise 'l2 is .rather abrupt, and that when' the cam lift roller S6 leaves the rise 'I2 it does so wtih a quick drop which causes the parts, including the web 48, the support arm 38, and the comb assembly 25 to vibrate.

I This vibrating action is accentuated by the fact that the parts, while fairly well balanced, are comparatively heavy, and any force which throws them oif balance will be reflected to the spring 'I4 in the form of vibration, which will cause the spring I4 to vibrate, an-d the comb as#- sembly will also be vibrated therewith. By means of high speed moving pictures, and by other means it has been determined that the comb assembly will vibrate at least '7 or 8 and possibly more times each time the follower drops from the rise 12. This vibration, as pointed out in connection with the objects, seriously batters the quills 38, and also has a tendency to distort the woven material (which, during the time `such vibration normally occurs, undergoing a tying operation by the rotation of the quills 38). Any such distortion, however small, in a screen cloth of the type mentioned, is a serious matter and must be prevented if possible. VFor this purpose I have provided a locking means of which the lock roller 64 is a part, for the purpose of'preventing this vibration.

Carried by the shaft 28, and keyed to rotate with the plate cam 88, is an internal arcuate segmental cam 1B. This cam 'i6 is adapted to engage the lock roller 84 the instant the roller 66 moves from the rise l2 to the dwell 'I8 of the cam 68. This engaging action catches the web 4D with its attached brackets and the comb assembly 26 carried thereby at said instant of completion of change, and exerts a holding action on these parts against vibration. This holding action is caused by the engagement of the lock roller B4 with the interior cam 16 which restrains or prevents upward movement of the follower, and by the engagement of the lift roller 58 with the plate cam 68, which holds the follower against downward movement. This holding action against upward movement continues for only a fraction of the circumference of the cam 68, after which the internal cam 'l5 rides out of engagement with the lock roller 54, and the Web assembly 48 is released. 'Ihe lift roller 66 is then free to lift the web assembly 40 upon the rise 12, initiating another cycle of movement for the comb assembly 28.

As was indicated above, the lock roller 64 is adjustable with respect to the internal cam 'I6 by means of rotating or positioning thev bolt or shaft 58. This shaft 58, as was indicated above, is preferably slightly eccentric and the roller may be adjusted a sufficient amount by rotation of said eccentric shaft 58 to assure close engagement with the cam. The link 52 is adjustable with respect to the bracket 48 to position the comb assembly 26 with respect to the quill means by means of the bolts 50 and the set screw assembly 56.

For the purposes of illustration, it is noted that the comb assembly 26 includes a slide block member 78 which carries a front comb 88, and the comb assembly 26 also includes a back comb 82. The front comb rides on the back comb 82 and is movable by the movement of the slide block 18. Slide block 78 is moved by an arm |08 which is under control of the second plate cam 85 through the medium of the roller 88 and follower member 98, against which member 98 said arm IUI] bears and with respect to which it is adjustable by means of a set screw 92.

The cams 68, 18, 86 andV driven by the shaft 28 to keyed or otherwise fastened.

While I have described my invention in connection with certain specific embodiments thereof, it is to be understood that this is by Way of illustration rather than limitation and that the invention is to be Idefined by the appended claims which should be given a scope as broad as commensurate with the prior art.

I claim:

35 are all preferably which they may be l. In a weaving machine, a quill means, comb,

means movable with respect to said quill means and operating on a cycle of movement performing with said quill means certain weaving operations, means moving said comb means in saidv cycle of opeiations,said moving'means normally causing said comb means to vibrate at one portion of each said cycle of operation, and means at least substantially damping said vibrations means causing a cycle of relative movement between said comb assembly means and said quill means, and means substantially preventing vibration upon completion of said cycle of relative movement, without interfering with said relative movement.

3. In a weaving machine for weaving metallic screen cloth, comb assembly means, quill means, means causing a cycle ofrelative movement between said comb assembly means and said quill means, and means substantially preventing vibration upon completion of said 'cycle of relative movement, Without interfering with said relative movement, said preventing means comprising ay pair of cam actuated rollers, in connection with the means causing the cycle of relative movement above-mentioned, one of which rollers engages an internal, segmental arcuate camy preventing movement for vibration in one direction iollovv-v ing said portion of relative movement rstiabove mentioned, said second roller engaging a second cam preventing vibrating movement in the other direction.

4. In a Weaving machine, a vframe'means, a quill means carried by said frame means, a comb assembly journalled on said framemeans and movable with respect-to said quillmeans, means connectedv to said comb assembly successively moving said comb assembly means in a plurality of positions with respect to said quill means during a weaving operation, said moving means normally causing vibration of said comb assembly means in a position damaging said quill means and interfering with said weaving operation, and

means substantially preventing said vibration in said position.

5. In a'weaving machine of the class described, a frame means, weaving quill means carried by said frame means, a comb assembly means carried by'a support arm, said support arm being journalled on said frame means for movement of said comb assembly with respect to said quill means, means comprising a web carried bysaid support arm and movable therewithto move the comb assembly for a series of Weaving operations,

means defining a bracket integral with said web, cam engaging means adjustably carried by said bracket, cam means engaged by said cam engag-v ing means whereby said web andsaid comb assembly means are caused to move in performing the Weaving operations, a second cam engaging means carried by said bracket, a second cam means engaging said second cam engaging means during a fraction of the interval, said rst cam engaging means engages said first-mentioned cam, and thereby locking said comb assembly means with its support arm web and bracket means against objectional vibration with respect to said quill means.

6. In a weaving machine of the class described,- l

a frame means, 'weaving quillmeans carried by said frame means, a comb assembly means carried by a support arm, said comb assembly means and support arm being journalled for movement with respect to said quill means, means yin connection with said comb assembly means causing said comb assembly means to move as labove mentioned in carrying out a cycle ofweaving operations, saidlastvmentionedv means including. a cam engaging means and a cam means engaged thereby, and means in connection with said cam engaging means comprising a second cam engaging means, a second cam'engaged by said second cam engaging means, said second cam and second f assembly means through its Weaving operations,l

'and means comprising a second cam engaging means in connection with said web means, and ,meansy comprising an internal, segmented, arcuate cam engaging said second mentioned roller upon completion of the cycle of movement of said comb assembly means, the arrangement being 'such that said second mentioned cam and roller means lock the comb assembly against objectionable vibration due to the. action of said first mentioned cam. i

8, In a Weaving machineof the class described, a frame member, a comb assembly, said comb as' sembly being supported by said frame means, and movable with respect to said frame means, means comprising a web integral with said comb assembly, a cam engaging roller carried by said web, cam means comprising a plate cam engaging said roller and actuating the movement of said comb assembly means through its Weaving operations,

and means comprising a second cam engaging means in connection with said Web means, and

means comprising an internal, segmented, arcuate A cam engaging said second mentioned roller upon completion of the cycle of `movements of said comb assembly means, said second cam engaging roller being adjustable with respect to said second mentioned cam means.

` CARL O. BRUESTLE. 

